I try to implement the call hold method into SIP communicator. I have a
question about the SDP description.
Let's imagine that there are 2 users (user1 / user2).
When user1 wants to put in hold his communication with user2 , i get the SDP
description of the user2 (to be able to do a Re-Invite).
For example i get :
o=user2 0 0 IN IP4 192.168.0.35
c=IN IP4 220.127.116.11
m=audio 41476 RTP/AVP 97 3 0 110 5 8 4
m=video 41478 RTP/AVP 34 26
I have to add the attribute "a=sendonly" according to the RFC of SIP.
Now, my question. What should i do?
should i keep the "a=recvonly" attribute or should i replace it by
By the way, i don't understand where the attribute "a=recvonly" comes from.
The reason is that I only established a call before getting my example SDP.
So the attribute should be "a=sendrecv".
I hope everything is comprehensible :).
thanks for your help.